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No Auto shut-off

I had an older Air comp. with a bigger but damaged tank, and i bolted this electrc. motor and pump to the little smaller but no problem Newer Tank (campell also) this one have a worn cylinder, everything works Good now ,But the Auto Shut-off switch does not activate, is the sensor inside the Tank ?How can i find a Diagram?

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The shut off switch actuall works on air pressure build up most likely the contacts are burnt in the on position. replace the pressure switch and it will be fixed

Posted on Dec 17, 2007


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Can't auto stop

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The most likely reason it is tripping the breaker is that the second stage (smaller cylinder) is not doing the work it needs to do and the first stage (bigger cylinder) is pumping more now!,,,, higher pressure on this side makes the motor work harder.

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Oh, the compressor motor's borked or overworked and overheating, or its capacitor failed short (perhaps the motor is shutting off from thermal shutdown...but you get to find out whether that's so. Be safe.) Alternately the temperature sensors have gone touchy on you. Once you gently vacuum it clean, try keeping incandecent bulbs in series with the compressor to get an idea of how loaded that thing is as it runs for those 5 minutes or so; the load might change more than you expect, just pay attention.
Hopefully you won't have to replace the compressor or motor; but it's doable if you're a certified technician with like equipment (so you can handle the refrigerant decently.) Most shops will streamline a bunch of similar jobs together to cut the waste and setup time.
Bigger conditioners are so much more efficient than little ones...syndicate the A/C?

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